Pipe-wrench



A. J. GRNBERG.

PIPE WRENCH.

APPLICATION FILED FEB. Il. IQIs.

Patented June IO, 1919.

F/EZ

ALBERT J. GRANBERQJQF vsanfrzmin'cisco; c"AuronNIA.-v1

" n PIPE-WRENCH. Y

Specification of Letters'latent.

, r'Patented June 10, 1919.51'

np'piicationrmed re'bniaj *11, 191s. 'serial Nogzialiaei l To all whommay Gomera.' i

Be itknoivnthat I, ALnR a citizenbfthe United Statesres1d1ng atSan'Francisco, .inthe county ofrSa'n Francisco and Stateof California,have invented new yand useful Improvements in Pipe-Y y p mits thefingerland .thumb-'of the operatori` f to contact with opposite sidesrofsaid worm, j ,A for-,thepurpose of rotatingthe same,= for which purpose.also the edges of,A the` worm 65 Wrenches, of which vthe following isaspeciication. The present invention relates to improvements in pipewrenches, the purposeof the 5 invention` being to providea pipe wrenchwhich can be used to turn a pipe lying close" to a wall or other objectand which willbe strong and durable. which can bev readily adjusted fordifferent sizes of pipes, 'whichr will automatically, when applied tothe pipe, gripY thesame initially, so that imme-Y diately -upon thelmovement of the hand to turn the pipe the grip upon the pipe will bestrengthened-and by which on a further movement of the hand thelvpipe-can beY gripped with a very powerful pressure, thus absolutelypreventing slippage of the wrenchA upon the pipe; l. v

In the accompanying'drawing Figure 1 is a side view of my improved pipewrench; Fig. 2 is a rlongitudinalsection of the same; Fig. 3 is atranverse section on the line 3-3 of Fig. j f n i Referring to thedrawing, 1 indicates/a stationary jaw and 2 a movable or adjustable jaw.Said jaws 1, 2, are provided with opposing serrated surfaces, 3, 4,respectively, which, when the jaws are in their proper relativepositions diverge slightly from each other. The jaw 2 is provided with aguide 6 extending in a direction in general transverse to the workingface 4 of the jaw, and projecting `considerably in front of said workingface. Said guide is of an approximately cylindrical form, and isconnected to the jaw by a narrow neck 7. Said guide moves in a guideway8 extending in the jaw Y1 in a direction transverse to the workingmotion jof the extension is substantially Y i y so so.,that there isverylittle lateral motion of Q SeldXtenSOn.17;up0r1the eedaof therwormfn able'on shaft12,extending into jaw;l J. GrRANBnRG,` v l 1parallelwithfthe'guidd theinnerend of@ said shaftfbeing screwedk intosaidj'aw 1 The jaw lhas an. opening 10 therethrough rv extending fromside .to side,fin` whichk open- V60 ing the 'wornifll is located, andwhich perj arezmilled, asv shown uat Thehaldle 14ofg't Ye wrench to-ithe jaw l-by apivot pin 16lextending transf i verselythroughpsaid jaw,and of which the innerend is screwed into the jaw, Vthe 'lower portionof saidjawbeing bifurcatedto receiverthe upper reducedk portion of saidhan-` dle. Said'r'e'duced portion;hasAA at its upper j end a forkedextension 17', the membersof which extend on opposite sides'of shaft 412, 75

andV can bearagainst an endv of the worm ll onjsaid shaftwltjwill Abeobserved that the position of `the pivot 16' is such that the inalinement with the motionof the worm Y,11

Adight' spring 18, riveted at one end, as

Shawn at 19,.,to` the jaw lf, bearsgat itsrothen ;.end,: aga1nst ashoulder 22 of said handle, 85

and turns said handle about the shaft 16 and thereby presses saidforked'extension against vsaid worm. A side of the transverse opening1() forms a stop to limit the longitudinal movement of said worm withthe inward movement of said guide 6, and a shoulder 23 on the jaw- 1,adjacent to the 'spring 18, by limiting the corresponding movement ofthe handle 14, limits the longitudinal movement of the worm opposite tothat first named, to prevent the extension 17 from moving out ofengagement with the end of the worm due to its pivotal or lateralmovement while the worm moves longitudiattained by the extension 17striking against ythe portion of the jaw 1 in which is the head 'of thescrew 12.

The following is the mode of use of the nally outward. This eiect wouldalso be 100 wrench: The worm is first turned to move the movable jaw tosuch a distance from the irst jaw that the outer ends of the jaws arespaced apart slightly less than the diameter of the pipe to be turned bythe wrench.

The jaws are then applied on opposite sides of the pipe, `and the Wrenchis moved t0- Ward the pipe, causing the movable jaw to slide outwardly,carrying with it the worm, against the slight pressure of the spring 18,which pressure is, however, suflieient to cause the jaws to grip thepipe. Then, if thel handle be turned in the direction away from thespring, the Yeffect will be to cause the extension 17 of the handle tobear against the worm and press it toward the stationary jaw, therebycausing also the movable jaw to move toward the stationary jaw, and rmlygripping the pipe wrench so that, in the continued movement of thehandle, the pipe gripped thereby is turned.

It will therefore be seen that my improved pipe wrench possesses all thedesirable qualities of a pipe Wrench, namely, that it is of greatstrength, that it eanbe easily adjusted to different sizes of pipes,that it immediately, when applied to the pipe, furnishes an initial gripon the same, and that, when the turning movement is commenced, the gripis correspondingly increased. n

But perhaps the most striking advantage of my improved wrench is that itcan be used to turn pipes which are close to a wall or other object andwhich cannot be gripped by the ordinary pipe wrench.

I claim zl. A wrench comprising' a fixed jaw, a slidable jaw arranged 0nsaid fixed jaw, a Worm arranged iii said fixed jaw and engaged with saidslidable j aw for controlling the movement thereof relative to saidfixed jaw, and a handle pivoted in said fixed jaw and having anextension for engaging one end of said worm, the pivot of the handlebeing so located that said extension will overlap the end of the worm inall positions of the handle, said worm being mounted to slide freelylongitudinally toward said extension when said handle is turned in a di-4reetin to permit the jaws to separate,

whereby movement of the handle in the opposite vdirection causes saidextension to engage and move the worm, thus eeeting movement of theslidable jaw toward the iixed jaw for gripping the Work.

2. A wrench comprising a fixed jaw, a slidable jaw arranged on saidiixed jaw, a Worm arranged'in said fixed jaw and engaged with saidslidable jaw for controlling the movementthereof relative to said fixedjaw and supported upon a kfixed pivot pin for free limited longitudinalmovement in said xed jaw when permitted by the handle, and a. handlepivoted in said fixed jaw adjacent o'ne end of said worm and having anextension underlying said end of the Worm, the handle pivot being solocated that said extension will moveiin a curved path lyingsubstantially in the direction of the axis of said worm and will remainin position to engage the end of the worm in all positions of.

said handle, movement of the handle on the working stroke of said Wrenchserving to move said extension against said worm in the same directionas and coextensively withy the longitudinal movement of said worm, andmovement of the handle in the opposite direction permitting the Worm tohave unrestrained movement Within the limits of travel of saidextension.

A. J GRANBERG.

Copies'of this patentfmay bel obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. C. y

